Question

what are ultrasonic wave

Answer 1

Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" sound in its physical properties, except that humans cannot hear it. 

application of ultrasound✓✓✓

ultrasonic motion detectors use same ultrasonic waves in measuring distance. These motion detectors get the job done by emitting ultrasonic pulses and then measurethe time upon the return of those waves. Sonogrpahy is a process that is used to create the images of the internal organs of the body.

Answer 2

Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" (audible) sound in its physical properties, except that humans cannot hear it. This limit varies from person to person and is approximately 20 kilohertz (20,000 hertz) in healthy young adults. Ultrasound devices operate with frequencies from 20 kHz up to several gigahertz.

Ultrasound is used in many different fields. Ultrasonic devices are used to detect objects and measure distances. Ultrasound imaging or sonography is often used in medicine. In the nondestructive testing of products and structures, ultrasound is used to detect invisible flaws. Industrially, ultrasound is used for cleaning, mixing, and accelerating chemical processes. Animals such as bats and porpoises use ultrasound for locating prey and obstacles.Scientists are also studying ultrasound using graphene diaphragms as a method of communication.

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